// independent security research & testing

Break it
before they do.

Tu0 Security reviews source code, assesses systems for vulnerabilities and tests them the way a real attacker would, then explains exactly what we found and how to fix it.

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01 / services

What we do

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Source Code Audit

Manual, line-by-line security review of your codebase, supported by static analysis tooling, to find flaws that scanners alone miss.

  • Authentication, authorization & session logic
  • Injection, deserialization & input handling
  • Cryptography usage & secrets management
  • Business-logic and race-condition flaws
  • Third-party dependency risk
[!]

Vulnerability Assessment

A systematic review of applications, APIs and infrastructure to identify, verify and prioritise weaknesses across your attack surface.

  • Attack-surface discovery & asset mapping
  • Automated scanning with manual verification
  • Configuration & hardening review
  • False-positive triage
  • Risk-ranked remediation priorities
>_

Penetration Testing

Authorised, goal-driven attack simulation against web applications, APIs and networks to show what an adversary could actually achieve.

  • Web application & API testing
  • External / internal network testing
  • Exploitation & impact demonstration
  • Privilege escalation & lateral movement
  • Retest after fixes are applied

$ cat deliverables.txt

Findings reportEvery issue documented with affected component, reproduction steps and evidence.
Severity ratingsEach finding rated (Critical to Informational), with CVSS scoring where applicable.
Remediation guidanceConcrete, developer-ready fixes and hardening recommendations.
Executive summaryA plain-language overview of risk for non-technical stakeholders.

02 / approach

How an engagement works

  1. 01

    Scope & authorise

    We agree targets, objectives, testing windows and rules of engagement in writing before any testing begins.

  2. 02

    Recon & threat model

    We map the architecture, data flows and trust boundaries to focus effort where the real risk is.

  3. 03

    Test & analyse

    Manual review and testing, aided by tooling, aligned with recognised references such as the OWASP Testing Guide and ASVS.

  4. 04

    Report

    A clear findings report with severity ratings, evidence and remediation guidance, plus a walkthrough call.

  5. 05

    Retest

    Once fixes are in, we verify them and update the report so you can close issues with confidence.

authorised testing only confidential by default NDA on request no destructive testing without consent

03 / about

About Tu0 Security

Tu0 Security is an independent security practice focused on offensive security and secure code review. We work directly with engineering teams to find vulnerabilities in software and systems before attackers do, and to help fix them.

We believe a good assessment is one that developers can act on: findings are reproducible, prioritised by real-world impact, and paired with practical fixes.

04 / responsible disclosure

Responsible disclosure

We practise coordinated vulnerability disclosure. When our research uncovers a vulnerability in third-party software, we report it privately to the vendor or maintainer and give them reasonable time to release a fix before any details are made public.

If you believe you have found a security issue affecting this website or Tu0 Security, please email [email protected]. Our security.txt is published per RFC 9116.

05 / contact

Let's talk about your security.

Tell us what you'd like tested, a rough timeline, and any constraints. We'll reply to discuss scope.

[email protected]